Results 191 to 200 of about 12,946 (228)
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Inner-Loop Control for Electro-Hydraulic Actuation Systems
Journal of Dynamic Systems, Measurement, and Control, 2011This article presents the development of a multiple inner-loop control strategy for improving the performance of hydrostatic actuation systems. In these actuators, the presence of nonlinearities associated with pump/motor static friction and backlash, pressure drop in the piping system, and nonlinear friction at the load have a significant effect on ...
Mohammed A. El Sayed, Saeid Habibi
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Modeling and Control of Electro-Hydraulic Actuator
2019Modeling and position control of an Electro-Hydraulic Actuator (EHA) system is investigated in this paper. Linear ARX EHA system model is identified by taking the experimental data using system identification toolbox in the MATLAB/Simulink. From the identified models the best fit ARX 331 model is used to design a controller using fuzzy logic and ...
Beza Nekatibeb +3 more
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Fuzzy logic controllers for electro-hydraulic servo-actuators
2012 International Conference on Applied and Theoretical Electricity (ICATE), 2012The paper presents two fuzzy logic controllers used for electro-hydraulic servo-actuators command. The first is a Mamdani proportional controller with seven membership functions both on input and output and the second is a Sugeno controller also with seven membership functions on input and output. One follows the possibility to obtain good performances
Liviu Dinca, Jenica Ileana Corcau
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Pressure feedback effects of electro-hydraulic actuator system
2014 11th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI), 2014Vibration test of electro-hydraulic actuator is widely used in the field of industry like large dynamic system to guarantee the performance of the system. As the system is working under the high speed condition, the dynamic vibration test is required naturally.
Jong Yoon Choi +6 more
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Modeling and control of an airbrake electro‐hydraulic smart actuator
Asian Journal of Control, 2011AbstractIn this paper, an accurate model of an airbrake electro‐hydraulic smart actuator is obtained by physical considerations, and then different control strategies (variable‐gain proportional control, PT1 control with switching integrator, and second order sub‐optimal sliding mode control) are proposed and analyzed. This application is innovative in
Matteo Rubagotti +4 more
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Disturbance observer based position tracking of electro-hydraulic actuator
Journal of Central South University, 2015A nonlinear controller based on an extended second-order disturbance observer is presented to track desired position for an electro-hydraulic single-rod actuator in the presence of both external disturbances and parameter uncertainties. The proposed extended second-order disturbance observer deals with not only the external perturbations, but also ...
Kai Guo, Jian-hua Wei, Qi-yan Tian
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Nonlinear adaptive position tracking of an electro-hydraulic actuator
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2015This paper deals with position tracking control of a single-rod electro-hydraulic actuator subject to external disturbances and parameter uncertainties. In previous disturbance observer design methodologies for electro-hydraulic actuators, parameter uncertainties have been commonly regarded as disturbances and lumped together with external ...
Kai Guo, Jianhua Wei, Qiyan Tian
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1990
An electro-hydraulic actuator has an electric motor (25) disposed in a hydraulic fluid reservoir (17) and connected to drive a hydraulic fluid pump (23). The actuator includes an actuator rod (15) which extends or retracts as a piston (20) is hydraulically driven in a cylinder (19). An actuator housing (13) forms the reservoir (17) and the cylinder (19)
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An electro-hydraulic actuator has an electric motor (25) disposed in a hydraulic fluid reservoir (17) and connected to drive a hydraulic fluid pump (23). The actuator includes an actuator rod (15) which extends or retracts as a piston (20) is hydraulically driven in a cylinder (19). An actuator housing (13) forms the reservoir (17) and the cylinder (19)
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A New Development in Multiplex Electro‐hydraulic Actuators
Aircraft Engineering and Aerospace Technology, 1966THE continuing development of aircraft operational concepts has in recent years resulted in the emergence of a variety of flight control functions which are essential to the safety of the aircraft and which moreover have to be performed automatically, the task being either too difficult for the human pilot, or at least so difficult as to command so ...
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Response sensitivity of electro-hydraulic actuator for vehicle engine
2008 IEEE Vehicle Power and Propulsion Conference, 2008Electric-hydraulic actuators, with their many outstanding features, are widely used in automatic control systems for vehicle engines. A typical electric-hydraulic actuator consists of fast switching valves and plunger-type hydraulic cylinders. . In this article, we first investigate the theoretical properties of electric-hydraulic actuators and develop
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